Emission reduction liquid storage tank of vacuum system

Abstract

The utility model discloses an emission reduction liquid storage tank of a vacuum system. The emission reduction liquid storage tank comprises a tank body (1), a liquid collecting tray (2), a liquid inlet valve (3) and a balance valve (4). The novel liquid storage tank solves the problem that liquid collected by an existing conventional liquid storage tank secondarily volatilizes under the action of a vacuum pump to generate a large number of volatile organic compounds (VOCs), and the emission of the VOCs is not beneficial to environmental protection.

Description

Technical Field

[0001] The utility model relates to a device, in particular to a vacuum system emission reduction liquid storage tank device. Background Art

[0002] Vacuum systems are crucial production support systems in the chemical, pharmaceutical, and semiconductor industries. Vacuum concentration, in particular, uses a vacuum pump to reduce system pressure to increase solution concentration. Under vacuum, the boiling point of the solvent decreases, allowing it to evaporate rapidly at lower temperatures, thereby increasing concentration speed and efficiency.

[0003] During the vacuum concentration process, after the solvent is condensed by the condenser of the concentration equipment system, due to factors such as the condenser's cold liquid temperature and heat exchange, a considerable portion of the gaseous solvent is not condensed. It is directly drained out by the vacuum pump, generating a large amount of volatile organic compounds (VOCs). To reduce the generation of VOCs, the industry often adds a stage of deep condensation before the vacuum pump to perform a secondary condensation of the gaseous solvent. The condensate is collected in a storage tank to reduce VOCs emissions. However, in actual operation, after the condensate enters the storage tank, due to the existence of saturated vapor pressure, under high vacuum conditions, the liquid in the storage tank evaporates for a second time. The gaseous solvent generated by the secondary volatilization will be directly discharged by the vacuum pump to emit VOCs. Under the long-term action of the vacuum pump, the liquid loss is very large, resulting in a weakening of the VOCs reduction effect of this solution.

[0004] The utility model provides a vacuum system emission reduction liquid storage tank which can solve the problem that the liquid collected in the existing conventional storage tank is secondary volatilized under the action of a vacuum pump to produce a large amount of VOCs. Utility Model Content

[0005] The utility model provides a vacuum system emission reduction liquid storage tank, which includes a tank body 1, a liquid collecting pan 2, a liquid inlet valve 3 and a balancing valve 4; wherein the tank body 1 and the liquid collecting pan 2 are connected by welding or self-sealing, and the liquid collecting pan 2 divides the liquid storage tank into two parts, an upper part and an lower part; the liquid collecting pan 2 is used to collect liquid in the upper part of the liquid storage tank; wherein the liquid inlet valve 3 is located at the center of the liquid collecting pan 2, and serves as a one-way valve structure for the upper liquid to enter the lower channel, and only allows the liquid to flow from top to bottom; the balancing valve 4 is a one-way valve device for balancing the vacuum degree of the upper and lower parts of the liquid storage tank.

[0006] In some embodiments, the liquid collecting tray 2 is an inverted cone-shaped disk having an outer diameter consistent with the inner diameter of the liquid storage tank and made of the same material, and a circular hole for installing the liquid inlet valve 3 is provided in the center thereof.

[0007] In some embodiments, the balancing valve 4 is a one-way valve installed on the periphery of the liquid collecting tray 2 close to the tank body, and the flow direction is from bottom to top.

[0008] In some embodiments, the tank body 1 , the liquid collecting tray 2 , the liquid inlet valve 3 and the balancing valve 4 are made of a material selected from stainless steel, glass or plastic.

[0009] The utility model utilizes structural separation to place the liquid at the lower end, which is not located in the same part as the vacuum channel, greatly reducing the generation of VOCs by secondary volatilization, thereby greatly improving the emission reduction effect of the secondary condensation solution.

[0010] The liquid collecting tray 2 of the present invention is an inverted cone-shaped disk, the center of which is slightly lower than the outer edge of the disk so that the liquid flows toward the center.

[0011] In this utility model, when the vacuum system is operating, the non-condensable gas generated by the volatile liquid undergoes secondary condensation in the condenser and then condenses into liquid. The liquid enters the storage tank and is collected by the liquid accumulation tray. It then enters the lower part of the liquid storage tank through the liquid inlet check valve. When the pressure in the upper and lower parts of the liquid storage tank is stable, the balance check valve is closed, isolating the liquid in the lower part of the liquid storage tank from the upper part, and no secondary volatilization occurs, thereby significantly reducing the generation of VOCs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0015] Example 1

[0016] A vacuum system emission reduction liquid storage tank, which includes a tank body 1, a liquid collecting pan 2, a liquid inlet valve 3 and a balancing valve 4; the tank body 1 and the liquid collecting pan 2 are connected by welding or self-sealing, and the liquid collecting pan 2 divides the liquid storage tank into two parts, an upper part and an lower part; the liquid collecting pan 2 is used to collect the liquid in the upper part of the liquid storage tank; the liquid inlet valve 3 is located in the center of the liquid collecting pan 2, as the upper liquid enters the lower channel, it is a one-way valve structure, only allowing the liquid to flow from top to bottom; the balancing valve 4 is a one-way valve device that balances the vacuum degree of the upper and lower parts of the liquid storage tank; the liquid collecting pan 2 is an inverted cone-shaped disc with an outer diameter consistent with the inner diameter of the liquid storage tank and a consistent material, with a circular hole in the center for installing the liquid inlet valve 3; the balancing valve 4 is a one-way valve installed on the outer periphery of the liquid collecting pan 2 close to the tank body, and the flow direction is from bottom to top; the materials of the tank body 1, the liquid collecting pan 2, the liquid inlet valve 3 and the balancing valve 4 are all selected from stainless steel.

[0017] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A vacuum system emission reduction liquid storage tank, characterized in that: The invention comprises a tank body (1), a liquid collecting tray (2), a liquid inlet valve (3) and a balancing valve (4); the tank body (1) and the liquid collecting tray (2) are connected by welding or self-sealing, and the liquid collecting tray (2) divides the liquid storage tank into two parts, an upper part and an lower part; the liquid collecting tray (2) is used to collect liquid in the upper part of the liquid storage tank; the liquid inlet valve (3) is located at the center of the liquid collecting tray (2), and serves as a one-way valve structure for the upper liquid to enter the lower channel, and only allows the liquid to flow from top to bottom; the balancing valve (4) is a one-way valve device for balancing the vacuum between the upper and lower parts of the liquid storage tank.

2. The liquid storage tank according to claim 1, characterized in that: The liquid collecting tray (2) is an inverted cone-shaped disc with an outer diameter consistent with the inner diameter of the liquid storage tank and made of the same material, and a circular hole for installing the liquid inlet valve (3) is provided at its center.

3. The liquid storage tank according to claim 1, characterized in that: The balancing valve (4) is a one-way valve installed on the outer periphery of the liquid collecting tray (2) close to the tank body, and the flow direction is from bottom to top.

4. The liquid storage tank according to any one of claims 1 to 3, characterized in that: The material of the tank body (1), the liquid collecting tray (2), the liquid inlet valve (3) and the balance valve (4) is selected from stainless steel, glass or plastic.

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